Hair brush



FIG. 1 is a perspective view of a hair brush showing my new design;

FIG. 2 is a view from one side thereof;

FIG. 3 is a view from the opposite side thereof; and,

FIG. 4 is a bottom plan view thereof.

The broken line structure representing bristles, is for illustrativepurposes only and forms no part of the claimed design.

The ornamental design for a hair brush, as shown and described.